DE1761442B2 - WRITING AND DISPLAY BOARD - Google Patents

Description

In order to easily enlarge the magnetic Ari7 Formation of the invention a plurality of panels with form-fitting recesses arranged towards the edge modularly attached to one another.

Further features of the invention can be found in the claims.

Various exemplary embodiments of the invention have been and are shown as drawings described in more detail below. It shows

Fig. 1 one for the different versions joint supervision of the invention,

Fig. La the sectional view of a magnetic Pen,

F i g. 2 shows the sectional view of a magnetic eraser.

Fig. 3 shows the sectional view of Fig. 1 mil a first embodiment of the invention,

F i g. 4 shows the sectional view according to FIG. 1 with a second embodiment of the invention,

FIG. 5 shows the sectional sausage according to FIG. 1 with a third embodiment of the invention.

The plan view shown in Fig. 1 is common to all embodiments of the invention. she shows a matrix of cells in a board with permanently magnetized layers and a transparent top layer. Each cell contains a cylindrical magnet with contrasting colored pole faces. These magnets are normally withdrawn from the viewing surface and the visible pole face facing the same Color as the scoreboard on. This results in an essentially uniformly colored viewing area. When a magnetic pen is over the board is guided, the individual magnets are drawn into the viewing area and at the same time rotated so that they represent a line of contrasting colored dots to the viewer. on In this way, characters, writing, surface patterns or the like can be made visible. the Erasure is done by guiding a magnetic eraser over the image surface, causing the magnets be pushed back from the viewing surface and return to the old position.

In Fig. 1, the viewing panels 10 A, 10 B and IOC are provided with complementary edges. The limit 11 z. B. has a sawtooth shape, while the right and left edges of each panel are formed from half hexagons and thus represent the fit limit 12. This modular construction enables several panels to be put together. The distance between the cell centers of two adjacent panels is equal to the distance between the cell centers within one panel. This results in a uniform mosaic pattern of the cells, which is independent of the number of board modules.

The panels IQA, 10 [beta] and IOC are covered by a transparent cover layer 13. For reasons of drawing technology, the photographically negative representation appears in FIG. 1. The cells 14 and the retracted magnets 15 therefore appear stronger in the drawing than in reality. When the magnetic pen 17 (Fig. La) is drawn over the image surface and the withdrawn magnets rotate and move in the direction of the viewing surface, their white pole surface 16 appears in the black viewing plane. The letters "A, O" shown in FIG. 1 appear as a sequence of white dots which stand out against a black background. The white pole faces of the rotated magnets 16 point to the trans-

parent layer 13, while the non-rotated

Magnets 15 remain in the retracted position.

The magnetic eraser 18 is used for deletion

(Fig. 2) guided the screen. The

Magnets 16 with simultaneous rotation in their

ίο withdrawn position; their polity in the direction of The viewing area has the same color as the MagnetelS. The magnetic poles of the extinguisher 18 are oriented opposite to those of the magnetic pen 17.

The various embodiments of the invention are best seen in the sectional views see.

F i g. 3 shows the first embodiment of the invention in which a magnetized layer is added to it

used, the magnets in one of two possible positions either by attraction unlike poles or by pushing off poles of the same name. The magical shift 21 is oriented in such a way that its north pole becomes the transparent

th cover layer 13 and its south pole facing the non-magnetic spacer layer 19. By means of suitable The magnetized layer 21, the spacer layer 19 and the magnetic base layer are adhesives 20 held together. Just because of her relative position differently numbered magnets 15 and 16 are permanent-magnetic, with the south pole face being light colored and the other faces of the magnet are kept uniformly dark. When the magnet 15 is in the withdrawn

Is in position, it is drawn to the base layer 20 by its own magnetization.

Due to the common forces of the erasing magnet and the magnetized layer 21, the Magnet 15 from the visible position into the retracted one Rotated position, with its north pole with the Aligns the south pole of the layer. When the magnetic pen 17 (Fig. La) over the surface of the Cover layer is guided, its very strong magnetic field overcomes the weaker fields

of layers 21 and the magnets are drawn towards the viewing surface. At this Moving forward, the magnets rotate so that their south pole is aligned with the north pole of the pen and facing the layer 21 and thus a stable position

so is achieved. The deletion takes place by mutual repulsion of the south poles of the magnetic Extinguisher 18 (Fig. 2) and magnet 16.

A higher level of operational safety is achieved by using the construction shown in FIG.

In this embodiment, two magnetized layers 22 that are spatially separated from one another are produced and 23 used together with magnets 15 and 16, animals color with that of the layers (preferably black) and the one light colored

Have pole face. The layer 22 immediately below the transparent cover layer 13 has its magnetic north pole at the point of contact between the two layers. The spacer layer 24 is not magnetically and with the appropriate adhesive

layers 22 and 23 connected. The layer 23 is polarized so that its south pole is the south pole of the Layer 22 is opposite. The south poles of the magnets 15 and 16 again have a light surface. the

Base layer 25 is non-magnetic and can have trans-field equipped magnetic holes 18 den

be kept parent, so that the display device also magnets back from the viewing surface, ds

can be used on both sides. The field dei for the executors because of its moment of inertia

tion of the Fig. 4 typical dimensions used penetrates layer 23 and then completely fixed

see a diameter of 5 for the magnets. Once the magnet is held,

0.040 inches, a length of 0.030 inches and for that the field of the eraser is not enough to use it

Cells 14 0.062 inches in diameter to tighten one.

Depth of 0.080 inches, and a center-to-center spacing of The final embodiment of the invention according to

0.082 inches in front. The depth of the cells 14 continues in FIG. 5 differs from the structure according to FIG

from aligned holes in the io Fig. 4 only in that the magnets are not per-

Layers 22 and 23 (0.030 inch each) and the spacer are magnetically magnetic. In this arrangement

layer (0.020 inch) together. they are magnetized by the fields of

In the embodiment shown in FIG. 4, layers 22, 23 are influenced. Because of your

If the magnets are in the respective position due to hysteresis, they hold the induced magnetization

the attractive forces of dissimilar magnetic 15 for one to generate the necessary movement

Pole held. A change of position is only and rotation under the influence of the magnetic

possible if they are rotated. The strong field of the pen or the magnetic eraser

of the magnetic pen 17 is sufficient for sufficient time. They are in their end positions

to attract and rotate the magnet 15. To the magnetic force of layers 22 and 23, respectively

on the other hand, the presses held with a slightly weaker ao.

1 sheet of drawings

72

Claims (9)

are oppositely oriented and its magnetic patent claims: table field strength not greater than for aligning the display elements in their home position 1. Writing and display board with in one is required. Large number of adjacent cells rotatable 5 10. Panel according to one of claims 1 to 9, and displaceably arranged small bodies, characterized in that they are perpendicular to which wholly or partially contain magnetizable layers made of permanently magnetic board plane, or with magnetically influenceable material
colored or similarly marked pole faces exist and that by wiping over with a magnetio see pen to visualize the
desired character behind a transparent
The top layer of the board can be aligned in one of two possible positions, characterized in that the side walls 15 display panel with one or more magnetized lying cells rotatably and displaceably arranged in a large number of each cell next to one another. 21, 22, 23) contain the polar in Neten small bodies that are completely or partially aligned from the direction parallel to the cell axis permanent magnetic or magnetically influenceable, and that each display element in a material with colored or. Ä. Marked pole faces in the one cell consist location on the cell bottom and in 20 and which rests with a sweep of one of the other location on the cell ceiling, magnetic pen for the visualization of said display element and magnetized loading desired character behind a transparent rich the 'z .eilenwand polmäßig parallel excluded top layer of the panel are aimed in one of two possible ways and the poles of the display element positions can be aligned. and the one that interacts with it 25 Magnetic display boards are already the magnetic area of the cell wall, where a magnetic pen magnetizes Bare particles for the representation of a character are oriented opposite 2. Board according to claim 1, characterized in that it draws under a transparent viewing area, that the walls of each cell are melted (U.S. Patent 2,853,830). a magnetized layer (21) and a 30 According to another, by the United States patent between this and the magnetic basic 3 103 751 known arrangement verden within surface (20) of the cell arranged non-magnetic small chambers slidably arranged cylinder between spacer layer (19) confess. shaped permanent magnet rods by action 3. Board according to claim 1 characterized by moving a magnetic pen and by shows that the walls of each cell from adhesion to a transparent material in their two oppositely magnetized layers kept observation position. Such an approach (22, 23) exist, between which a non-order can, however, not be used regardless of position magnetic distance layer (24) is arranged. will. It is only for a vibration free 4. Panel according to claim 3, characterized in that it is suitable for use. In addition, their manufacture is great shows that the base (25) of each cell 40 is expensive and the typeface is not very contrasting made of non-magnetic, or, like the top layer, rich. the board made of transparent materia! consists. Furthermore, according to the USA patent specification 5. Panel according to one of claims 1 to 4, Re-Re 25 822 an arrangement is known, characterized in that the cells (14) and individual magne.isiert. spherical particles with the display elements cylindrical shape (15, 16) 45 contrasting colored hemispheres, of which have. everyone is in a chamber by action 6. Board according to one of claims 1 to 5, a magnetic pen are rotated, characterized in that the cells in a disadvantage is the fact that only one level (WA) are arranged. vibration-free use is possible because the 7. Board according to claim 6, characterized marked 50 magnetic balls by no additional forces in that several board parts (10/4, 105, their viewing position are held. 10C) with a form-fit arrangement arranged towards the edge. The object of the invention is to create a sigen recesses juxtaposed in a modular manner Device for making characters visible, are. Font, surface pattern !! or the like with veroesser- 8. Board according to claim 6, characterized in that it is characterized by image contrast and position-independent and bump marks, that the magnetic pen (17) less sensitive use. in the form of a stick-shaped writing implement. This object is achieved according to the invention at its end an aligned in S'iftachse solved that the side walls of each cell one or Contains magnet, the outer pole of which contains several magnetized areas, the pole- PoI of the point in the direction of the viewing area- 60 moderately in the direction parallel to the cell axis. the, in the rest position display element are directed and that each display element in a coincides, but a larger magnetic cell in one layer on the cell bottom and in the Field strength than the display element possesses. other layer rests on the cell ceiling, whereby 9. Board according to claim 7, characterized in the display element and magnetized areas draws that one on the transparent viewing cell wall are aligned in poles and parallel processing surface of the panel movable magnetic the poles of the display element and each with Eraser (18) is provided, its magnetic field cooperating with it Poles are oriented opposite to those of the magnetic pen (17) of the cell wall.